CN110482759A - A kind of comprehensive waste liquid multiplexed combination recovery processing technique of oilfield operation - Google Patents
A kind of comprehensive waste liquid multiplexed combination recovery processing technique of oilfield operation Download PDFInfo
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- 239000002699 waste material Substances 0.000 title claims abstract description 92
- 238000012545 processing Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000011084 recovery Methods 0.000 title claims abstract description 28
- 239000012530 fluid Substances 0.000 claims abstract description 21
- 238000005189 flocculation Methods 0.000 claims abstract description 18
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- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
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- 239000010432 diamond Substances 0.000 claims description 8
- 230000001590 oxidative effect Effects 0.000 claims description 8
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 7
- 229910003460 diamond Inorganic materials 0.000 claims description 7
- 150000003839 salts Chemical class 0.000 claims description 7
- 239000012141 concentrate Substances 0.000 claims description 6
- 238000005188 flotation Methods 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 238000001223 reverse osmosis Methods 0.000 claims description 6
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- DKFCNIGGENJIJN-UHFFFAOYSA-L aluminum;iron(2+);sulfate Chemical compound [Al+3].[Fe+2].[O-]S([O-])(=O)=O DKFCNIGGENJIJN-UHFFFAOYSA-L 0.000 claims description 4
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- 238000002604 ultrasonography Methods 0.000 abstract description 6
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- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
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- 229910000329 aluminium sulfate Inorganic materials 0.000 description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 4
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- 230000010355 oscillation Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000003079 shale oil Substances 0.000 description 2
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- 241000894006 Bacteria Species 0.000 description 1
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- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
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- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
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- 230000003197 catalytic effect Effects 0.000 description 1
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- 239000013043 chemical agent Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
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- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
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- 239000011707 mineral Substances 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
Abstract
The invention discloses a kind of comprehensive waste liquid multiplexed combination recovery processing techniques of oilfield operation, it may be implemented to the fracturing outlet liquid generated in oilfield exploitation procedure, waste liquid of drilling, the synthesis waste liquid that well-flushing backflow waste liquid and acidizing waste fluid are formed is recycled, by being pre-processed to waste liquid, sedimentation, after dual flocculation, it is sampled by technical staff after carrying out water analysis, performance evaluation is carried out for suspension content and oil content, and then select most suitable processing mode, poly- oily waste liquor wherein is contained for high pollution, by air bearing, after backwash filter processing, contaminant degradation and COD removal in waste liquid are carried out using ultrasonic wave materialization combination multidimensional electrochemical techniques, novel sound combination slot is introduced simultaneously, principle of reflection based on ultrasound is obviously improved treatment effect, realize the harmless treatment to comprehensive waste liquid, make it Reach reuse or discharge standard, reduces the destruction to environment.
Description
Technical field
The present invention relates to environmental technology fields, more specifically to a kind of comprehensive waste liquid multiplexed combination of oilfield operation
Recovery processing technique.
Background technique
With the development of world economy, countries in the world are being continuously increased the demand of the energy, and conventional gas and oil resource
It is increasingly depleted, significant progress has been obtained by the exploitation of the unconventional petroleum resources of representative of shale oil gas in recent years, has been become
The new growth point of world energy supplies, with deepening continuously for oil-gas field development, fracturing outlet liquid, waste liquid of drilling, well-flushing are returned
The quantum of output of the fracturing wastewaters such as removal waste fluid and acidizing waste fluid is gradually increased, and carries out environmental protection treatment and enable to recycle to make to them
With, it has also become current each Gas Company both at home and abroad primarily solves the problems, such as.
But single recovery processing is often carried out just for waste liquid in the prior art, for for fracturing outlet liquid,
Fracturing outlet liquid is noteworthy characterized by that salinity is high, hardness is high, viscosity is high, suspended solid is more, chemical agent complicated component, COD
High, stable system.The composition of fracturing outlet liquid is sufficiently complex, the various chemical medicaments and support that when existing preparing fracturing fluid is added
Agent, including drag reducer, crosslinking agent, gel, surfactant, antisludging agent, sustained release agent, fungicide and various inorganic salts, quartz sand
Or artificial haydite etc., the volume of Zhan great Yue 4%, there are also the water flooding taken out of in stratum, mineral oil, mineral grain, bacteriums etc..Cause
This, fracturing outlet liquid is a kind of extremely intractable industrial wastewater, complex treatment process based on qualified discharge, at high cost, potential
Risk is big, and the disposition of reinjection into reservoir equally exists huge environmental risk and high cost problem.Especially merit attention
It is that the high-volume drilling well in scale development area, pressure break are especially big to the demand of water, often exceeds the water resource limit in region,
Restraining factors as shale gas exploitation.Still further aspect contains a large amount of organic chemicals in fracturing outlet liquid, to discharge environment
(either earth's surface or stratum) all composing environment risks, deal carefully with it, are disposed, and are hyposmosis, shale oil gas field
The key that success is developed.
Treatment process currently based on qualified discharge purpose mainly includes physico-chemical process, electrochemical method and a small amount of life
Object technical method, less effective, processing cost is high and is difficult to hold, and external common disposition means are different after simple process
Ground recharge dried layer (invalid re-injection), higher cost, and cause the waste of expensive chemical assistant in water resource and flowback liquid system.
Foreign countries have the application that preparing fracturing fluid is repeated after trial handles fracturing outlet liquid, achieve certain effect, but for comprehensive
The recovery processing for closing waste liquid is determined that the difficulty of its processing is bigger, is especially worked as place due to the complexity and uniqueness of its component
It also needs targetedly to remove the substance for being possible to influence fracturing fluid property when being used further to preparing fracturing fluid after reason, retains useful
Substance, therefore domestic at present technology and immature, it is difficult to realize the effective recycling to comprehensive waste liquid.
Summary of the invention
1. technical problems to be solved
Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a kind of comprehensive waste liquid of oilfield operation is more
Member combination recovery processing technique, it may be implemented to the fracturing outlet liquid, waste liquid of drilling, well-flushing generated in oilfield exploitation procedure
The synthesis waste liquid that backflow waste liquid and acidizing waste fluid are formed is recycled, by being pre-processed, being settled to waste liquid, dual wadding
It after solidifying, is sampled by technical staff after carrying out water analysis, carries out performance evaluation for suspension content and oil content, and then select
Most suitable processing mode after air bearing, backwash filter processing, uses wherein containing poly- oily waste liquor for high pollution
Ultrasonic wave materialization combination multidimensional electrochemical techniques carry out contaminant degradation and COD removal in waste liquid, while introducing novel sound
Combination slot, principle of reflection based on ultrasound are obviously improved treatment effect, realize to the harmless treatment of comprehensive waste liquid, reach it
To reuse or discharge standard, the destruction to environment is reduced.
2. technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
A kind of comprehensive waste liquid multiplexed combination recovery processing technique of oilfield operation, comprising the following steps:
S1, pretreatment:, to hydrocyclone, separation of solid and liquid removal will be carried out through the anti-synthesis waste collection ejected of import
Silt in comprehensive waste liquid；
S2, sedimentation: the synthesis waste liquid after desanding is delivered into settling tank, carries out the sedimentation of mechanical admixture；
S3, dual flocculation: the boosted pump of the synthesis waste liquid after sedimentation is delivered in fluid reservoir, investment inorganic agent is wadded a quilt with cotton
Solidifying processing, reaction are not further added by flocculate；
S4, water analysis: to the synthesis waste liquid after flocculation after flocculate settles and suspended matter filters, water quality point is carried out
Performance evaluation is analysed while carrying out, if suspension content is lower than 50mg/L, oil content is lower than 5mg/L, then enters step S5, if suspending
Object content is 50mg/L-100mg/L, and oil content 5mg/L-30mg/L then enters step S6, if suspension content is higher than
100mg/L, oil content are higher than 30mg/L, then enter step S7；
S5, directly processing: appropriate additive is supplemented, fracturing fluid after the recovery is sufficiently mixed to obtain；
S6, dilution processing: appropriate additive is supplemented after suitable clear water dilution is added, is sufficiently mixed to obtain pressure break after the recovery
Liquid；
Comprehensive waste liquid: being delivered in flotation tank carry out air-flotation process first by S7, advanced treating, by mud scraper by mud scum
It collects into sludge-tank, comprehensive waste liquid is successively then passed through into dual full-automatic back washing formula filter, then discharges into filtrate
In sound combination slot, in such a way that ultrasonic wave inducing catalysis cooperation oxidant is to filtrate oxidation processes, it is dirty to carry out organic compound
The degradation of dye object and the removal of COD, subsequent plus alkali adjusting filtrate pH value to 7-8, then the filtrate after neutralization is penetrated by reverse osmosis
Filter carries out secondary filter, and infiltration water is pumped to water tank reuse, and concentrate carries out sterilization processing via ultraviolet sterilizer；
Concentrate after S9, sterilization processing carries out distillation processing by rotary evaporator, and the salt of crystallization is recycled to storage salt
Slot, condensed solution supplement appropriate additive, are sufficiently mixed to obtain fracturing fluid after the recovery.
Further, the pressure drop of eddy flow technique is 0.3-0.5MPa in the step S1.
It further, further include that sedimentation agent is put into settling tank in the step S2, every m3Comprehensive waste liquid investment is sunk
Depressant prescription amount is 2-10kg/m3, sedimentation time 10-15h.
Further, every m in the dual flocculation of step S33The treatment dosage of comprehensive waste liquid investment is flocculant 4-
10kg/m3With flocculation aid 1-3kg/m3。
Further, the flocculant is liquid palymeric aluminium sulfate iron, and the flocculation aid is polyacrylamide, polyaluminum sulfate
Ferro-aluminum has both the dual flocculating properties of molysite and aluminium salt, usually based on molysite, supplemented by aluminium salt.
Further, air-float technology uses air-dissolving air-float form, reflux ratio 40-50% in the step S7.
Further, the sound combination slot includes groove body, is mounted on the inner wall of the groove body left and right ends a pair of super
Sound wave shakes plate, and the groove body upper end is fixedly connected with mounting plate, is equipped with cross reflecting plate in the groove body, the cross is anti-
It penetrates plate upper end and is fixedly connected with transmission shaft, the mounting plate upper end is equipped with driving motor and retarder, the driving motor
Output end is connect with retarder, and the output end of the retarder is connect with transmission shaft by shaft coupling.
Further, a pair ultrasonic wave shake plate of the same side is tilted a certain angle to direction close to each other, institute
Stating tilt angle is 5-10 degree.
Further, the cross reflecting plate is that four pieces of titanium alloy plates are integrally formed, the stainless steel surface point
Several diamond convex surfaces are furnished with, and diamond convex surface is same as titanium alloy plate is integrally formed.
Further, the reverse osmosis filter uses PTFE charged membrane.
3. beneficial effect
Compared with the prior art, the present invention has the advantages that
This programme may be implemented to return waste discharge to the fracturing outlet liquid, waste liquid of drilling, well-flushing that generate in oilfield exploitation procedure
The synthesis waste liquid that liquid and acidizing waste fluid are formed is recycled, by being pre-processed, being settled to waste liquid, after dual flocculation,
It is sampled by technical staff after carrying out water analysis, carries out performance evaluation for suspension content and oil content, and then select and most close
Suitable processing mode, wherein containing poly- oily waste liquor for high pollution, after air bearing, backwash filter processing, using ultrasound
Wave materialization combination multidimensional electrochemical techniques carry out contaminant degradation and COD removal in waste liquid, while introducing novel soundization combination
Slot, principle of reflection based on ultrasound are obviously improved treatment effect, realize to the harmless treatment of comprehensive waste liquid, reach back
With or discharge standard, reduce destruction to environment.
Detailed description of the invention
Fig. 1 is the main flow diagram of the present invention；
Fig. 2 is the main flow diagram in advanced treating part of the present invention；
Fig. 3 is the component list of the comprehensive waste liquid items of the present invention；
Fig. 4 is the ingredient table of comparisons before and after the comprehensive liquid waste processing of the present invention；
Fig. 5 is the structural schematic diagram that soundization of the present invention combines slot part.
Figure label explanation:
1 groove body, 2 ultrasonic wave shake plates, 3 mounting plates, 4 driving motors, 5 retarders, 6 transmission shafts, 7 cross reflecting plates.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description；Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments, is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "inner", "outside", " top/bottom end "
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention and simplification retouch
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only, and cannot understand
For indication or suggestion relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " is set
Be equipped with ", " be arranged/connect ", " connection " etc., shall be understood in a broad sense, such as " connection ", may be a fixed connection, be also possible to removable
Connection is unloaded, or is integrally connected, can be mechanical connection, is also possible to be electrically connected, can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements, for the ordinary skill in the art, can be specific
Situation understands the concrete meaning of above-mentioned term in the present invention.
Embodiment 1:
The comprehensive waste liquid multiplexed combination recovery processing technique of a kind of oilfield operation referring to FIG. 1-2, comprising the following steps:
It is 0.5MPa by the pressure drop through the anti-synthesis waste collection ejected of import to hydrocyclone, eddy flow technique, carries out solid-liquid point
It leaves away except the silt in comprehensive waste liquid；Synthesis waste liquid after desanding is delivered into settling tank, sedimentation agent is put into settling tank,
Every m3The sedimentation dosage of comprehensive waste liquid investment is 5kg/m3, sedimentation time 15h carries out the sedimentation of mechanical admixture；After sedimentation
The comprehensive boosted pump of waste liquid is delivered in fluid reservoir, and investment inorganic agent carries out flocculation treatment, the processing of the comprehensive waste liquid investment of every m3
Dosage is flocculant 10kg/m3 and flocculation aid 3kg/m3, and flocculant is liquid palymeric aluminium sulfate iron, and flocculation aid is polyacrylamide
Amine, polymeric aluminum sulfate iron has both the dual flocculating properties of molysite and aluminium salt, and usually based on molysite, supplemented by aluminium salt, reaction is extremely
Flocculate is not further added by；To the synthesis waste liquid after flocculation after flocculate settles and suspended matter filters, it is same to carry out water analysis
Shi Jinhang performance evaluation, water analysis includes pH value, suspension content, oil content and 20 DEG C of viscosity, if suspension content is lower than
50mg/L, oil content are lower than 5mg/L, then directly supplement appropriate additive, fracturing fluid after the recovery is sufficiently mixed to obtain, if suspended matter
Content is 50mg/L-100mg/L, oil content 5mg/L-30mg/L, then supplements appropriate addition after suitable clear water dilution is added
Agent is sufficiently mixed to obtain fracturing fluid after the recovery, if suspension content is higher than 100mg/L, oil content is higher than 30mg/L, then first will
Comprehensive waste liquid, which is delivered in flotation tank, carries out air-flotation process, and air-float technology uses air-dissolving air-float form, reflux ratio 50%, by scraping
Mud machine collects mud scum into sludge-tank, comprehensive waste liquid is successively then passed through dual full-automatic back washing formula filter, then
Filtrate is discharged into sound combination slot, in such a way that ultrasonic wave inducing catalysis cooperation oxidant is to filtrate oxidation processes, is carried out
The degradation of organic compound pollutant and the removal of COD, subsequent plus alkali adjusting filtrate pH value to 7-8, then the filtrate after neutralization is passed through
Cross reverse osmosis filter carry out secondary filter, reverse osmosis filter use PTFE charged membrane, play further filtering suspended matter and
The effect of harmful ion, infiltration water are pumped to water tank reuse, and concentrate carries out sterilization processing via ultraviolet sterilizer；Sterilization
Treated concentrate carries out distillation processing by rotary evaporator, and the salt of crystallization is recycled to storage salt bath, condensed solution
Appropriate additive is supplemented, fracturing fluid after the recovery is sufficiently mixed to obtain.
Wherein additive should voluntarily carry out proportion selection by technical staff under different exploitation of oil-gas field environment,
The present embodiment is herein with no restrictions.
Referring to Fig. 5, sound combination slot includes groove body 1, a pair of of ultrasonic wave shake is mounted on 1 left and right ends inner wall of groove body
Plate 2 plays the role of conveying ultrasonic wave into waste liquid, and a pair of of ultrasonic wave shake plate 2 of the same side is inclined to direction close to each other
Oblique certain angle, tilt angle are 5 degree, are mutually inclined each other, and waste liquid on the one hand can be made to make in the concussion of ultrasonic wave
With lower cooperation gravity and confluence interference effect, the cavitation of ultrasonic wave is further increased, the cavitation of ultrasonic wave in the solution is made
With the organic pollutant therein that can degrade, however since the free radical yield of ultrasonic wave is lower, it needs to improve ultrasonic intensity
With increase the time, therefore be properly added inorganic agent come improve reaction rate be increase COD removal rate effective way, oxidant by
Hydrogen peroxide and ferrous ion composition, the two reacts the-OH free radical that can generate Strong oxdiative ability, due to the oxidation of-OH free radical
Reduction potential (2.80V) is much higher than traditional oxidant, so the very intractable organic matter of common oxidizer can be decomposed, but
It is that-OH free radical is only capable of the presence of and play oxidation under acidic environment, shows the ultrasonic oscillation time by many experiments
In 50min, pH value 3, Fe2+ ion concentration is 100mg/L, when hydrogen peroxide concentration is 1200mg/L, to pollutant in waste liquid and
The removal effect of COD is best, and 1 upper end of groove body is fixedly connected with mounting plate 3, is equipped with cross reflecting plate 7, cross in groove body 1
7 upper end of reflecting plate is fixedly connected with transmission shaft 6, and 3 upper end of mounting plate is equipped with driving motor 4 and retarder 5, driving motor 4
Output end is connect with retarder 5, and the output end of retarder 5 is connect with transmission shaft 6 by shaft coupling, and cross reflecting plate 7 is four
Block titanium alloy plate is integrally formed, and four pieces of titanium alloy plates can prevent from cross reflecting plate 7 when rotated and will appear gap making
The ultrasonic wave of the left and right sides meets counteractings, realize that 360 degree provide the reflecting surface of ultrasonic wave, one side itself can play machinery
The effect of stirring, another aspect auxiliary ultrasonic play the role of good ultrasonic reflections, both can to avoid corresponding ultrasonic wave it
Between cancel out each other, while the regularity of ultrasonic oscillation can also be avoided, so that catalytic oxidation effect not enough uniformly fills
Point, several diamond convex surfaces are distributed in stainless steel surface, and diamond convex surface is same as titanium alloy plate is integrally formed, diamond convex surface
Dispersibility and erratic behavior of the amplification ultrasonic wave when encountering cross reflecting plate 7 and reflecting are played, although will appear ultrasonic wave
Attenuation, technical staff can precompute transmitting attenuation to adjust the initial power of ultrasonic wave, pass through diamond convex surface
Transmitting the concussion of ultrasonic wave can be acted on and be distributed in each place of waste liquid, both played on the micro level to the cavitation of waste liquid work
With, while the inducing catalysis improved to oxidant acts on, the contaminant degradation and COD removal effect of waste liquid are promoted obvious.
It is worth noting that, first adding suitable oxidant after waste liquid is delivered in groove body 1, starting driving motor 4 is subtracting
It drives cross reflecting plate 7 to rotate by transmission shaft 6 under the decelerating effect of fast device 5, realizes the mixing between oxidant and waste liquid,
After this process continues 10min-15min, starting ultrasonic wave shake plate 2 provides ultrasonic wave.
Referring to Fig. 4, the suspension content before comprehensive liquid waste processing is 637mg/L, oil content 98.5mg/L, after processing
Suspension content is 32.5mg/L, oil content 3.4mg/L, and wherein the removal rate of suspended matter reaches 94.9%, the recycling of crude oil
Rate reaches 96.55%.
The present invention may be implemented to return waste discharge to the fracturing outlet liquid, waste liquid of drilling, well-flushing that generate in oilfield exploitation procedure
The synthesis waste liquid that liquid and acidizing waste fluid are formed is recycled, by being pre-processed, being settled to waste liquid, after dual flocculation,
It is sampled by technical staff after carrying out water analysis, carries out performance evaluation for suspension content and oil content, and then select and most close
Suitable processing mode, wherein containing poly- oily waste liquor for high pollution, after air bearing, backwash filter processing, using ultrasound
Wave materialization combination multidimensional electrochemical techniques carry out contaminant degradation and COD removal in waste liquid, while introducing novel soundization combination
Slot, principle of reflection based on ultrasound are obviously improved treatment effect, realize to the harmless treatment of comprehensive waste liquid, reach back
With or discharge standard, reduce destruction to environment.
The foregoing is intended to be a preferred embodiment of the present invention；But scope of protection of the present invention is not limited thereto.
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
It improves design and is subject to equivalent substitution or change, should be covered by the scope of protection of the present invention.
Claims (10)
1. a kind of comprehensive waste liquid multiplexed combination recovery processing technique of oilfield operation, it is characterised in that: the following steps are included:
S1, pretreatment: it through the anti-synthesis waste collection ejected of import to hydrocyclone, will carry out being separated by solid-liquid separation removal synthesis
Silt in waste liquid；
S2, sedimentation: the synthesis waste liquid after desanding is delivered into settling tank, carries out the sedimentation of mechanical admixture；
S3, dual flocculation: the boosted pump of the synthesis waste liquid after sedimentation is delivered in fluid reservoir, investment inorganic agent carries out at flocculation
Reason, reaction are not further added by flocculate；
S4, water analysis: to the synthesis waste liquid after flocculation after flocculate settles and suspended matter filters, it is same to carry out water analysis
Shi Jinhang performance evaluation, if suspension content is lower than 50mg/L, oil content is lower than 5mg/L, then S5 is entered step, if suspended matter contains
Amount is 50mg/L-100mg/L, and oil content 5mg/L-30mg/L then enters step S6, if suspension content is higher than 100mg/L,
Oil content is higher than 30mg/L, then enters step S7；
S5, directly processing: appropriate additive is supplemented, fracturing fluid after the recovery is sufficiently mixed to obtain；
S6, dilution processing: appropriate additive is supplemented after suitable clear water dilution is added, is sufficiently mixed to obtain fracturing fluid after the recovery；
S7, advanced treating: comprehensive waste liquid is delivered in flotation tank carries out air-flotation process first, collected mud scum by mud scraper
Into sludge-tank, comprehensive waste liquid is successively then passed through into dual full-automatic back washing formula filter, filtrate is then discharged into sound
In combination slot, in such a way that ultrasonic wave inducing catalysis cooperation oxidant is to filtrate oxidation processes, organic compound pollutant is carried out
Degradation and COD removal, then plus alkali adjusts filtrate pH value and passes through reverse osmosis filter to 7-8, then by the filtrate after neutralization
Secondary filter is carried out, infiltration water is pumped to water tank reuse, and concentrate carries out sterilization processing via ultraviolet sterilizer；
Concentrate after S9, sterilization processing carries out distillation processing by rotary evaporator, and the salt of crystallization is recycled to storage salt bath, cold
Solution after solidifying supplements appropriate additive, is sufficiently mixed to obtain fracturing fluid after the recovery.
2. the comprehensive waste liquid multiplexed combination recovery processing technique of a kind of oilfield operation according to claim 1, feature exist
In: the pressure drop of eddy flow technique is 0.3-0.5MPa in the step S1.
3. the comprehensive waste liquid multiplexed combination recovery processing technique of a kind of oilfield operation according to claim 1, feature exist
In: it further include that sedimentation agent is put into settling tank in the step S2, every m3The sedimentation dosage of comprehensive waste liquid investment is 2-10kg/
m3, sedimentation time 10-15h.
4. the comprehensive waste liquid multiplexed combination recovery processing technique of a kind of oilfield operation according to claim 1, feature exist
In: every m in the dual flocculation of step S33The treatment dosage of comprehensive waste liquid investment is flocculant 4-10kg/m3With flocculation aid 1-
3kg/m3。
5. the comprehensive waste liquid multiplexed combination recovery processing technique of a kind of oilfield operation according to claim 4, feature exist
In: the flocculant is liquid palymeric aluminium sulfate iron, and the flocculation aid is polyacrylamide.
6. the comprehensive waste liquid multiplexed combination recovery processing technique of a kind of oilfield operation according to claim 1, feature exist
In: air-float technology uses air-dissolving air-float form, reflux ratio 40-50% in the step S7.
7. the comprehensive waste liquid multiplexed combination recovery processing technique of a kind of oilfield operation according to claim 1, feature exist
In: the sound combination slot includes groove body (1), is mounted on a pair of of ultrasonic wave shake plate on the inner wall of groove body (1) left and right ends
(2), groove body (1) upper end is fixedly connected with mounting plate (3), is equipped with cross reflecting plate (7) in the groove body (1), described
Cross reflecting plate (7) upper end is fixedly connected with transmission shaft (6), and mounting plate (3) upper end is equipped with driving motor (4) and subtracts
The output end of fast device (5), the driving motor (4) is connect with retarder (5), the output end and transmission shaft of the retarder (5)
(6) it is connected by shaft coupling.
8. the comprehensive waste liquid multiplexed combination recovery processing technique of a kind of oilfield operation according to claim 7, feature exist
In: a pair ultrasonic wave shake plate (2) of the same side is tilted a certain angle to direction close to each other, and the tilt angle is
5-10 degree.
9. the comprehensive waste liquid multiplexed combination recovery processing technique of a kind of oilfield operation according to claim 7, feature exist
In: the cross reflecting plate (7) is that four pieces of titanium alloy plates are integrally formed, and several diamonds are distributed in the stainless steel surface
Convex surface, and diamond convex surface is same as titanium alloy plate is integrally formed.
10. the comprehensive waste liquid multiplexed combination recovery processing technique of a kind of oilfield operation according to claim 1, feature exist
In: the reverse osmosis filter uses PTFE charged membrane.
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